/Engine/Source/Editor/AnimGraph/Public/AnimBlueprintExtension.h
Request an anim blueprint extension for an anim blueprint. It is illegal to perform this operation once compilation has commenced, use GetExtension instead.
static [UAnimBlueprintExtension](API\Editor\AnimGraph\UAnimBlueprintExtension) * RequestExtension ( [UAnimBlueprint](API\Runtime\Engine\Animation\UAnimBlueprint) * InAnimBlueprint, [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UAnimBlueprintExtension](API\Editor\AnimGraph\UAnimBlueprintExtension) > InExtensionType )